EPS-J6 PLUS
Power
Circuitry
CHECKING THE POWER SUPPLY
Many
EPS-16
PLUS problems may be related
to
a faulty Power Supply, Transformer
or
Line Filter.
You
should check these before troubleshooting the rest
of
the unit.
Check
to
make sure that all the cable connections are secure and correct. Plug the
EPS-16
PLUS
in
and
turn
it
on.
Mter
the
EPS-16
PLUS has warmed up for five minutes, begin
to
test
the
voltages
at
the points shown in Figures 3
and
4~
If
the voltages vary outside the allowable limits, follow the
procedure described under
TESTING
TIlE
POWER SUPPLY UNLOADED before replacing
it
Green
Line
Filter
Top
Lug
@
WARNING!
There
are
dangerous
Voltages
present
in
this
area.
To
Power
",nT""'"
NOTE:
All
wires
come
from
the
bottom
of
the
transfonner.
Figure3
-
AC
Line Voltage
Check
Points
AC
LINE
VOLTAGE
MEASUREMENTS
(see Figure 3)
With the power switch OFF,
With the power switch ON,
the proper
AC
Line Voltage
the
proper
AC
Line Voltage should read
from:
should read from:
2B-IA, 2B-IB, 2B-3B, 2B-3A
2B-IA, 2B-2A, 2B-3B
There should be no voltage across the
power
switch.
EPS-J6
PLUS Service Manual
page
7
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